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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A240707 Sum of the middle parts in the partitions of 4n-1 into 3 parts.

Table of values

n a(n)
1 1
2 8
3 31
4 80
5 159
6 282
7 459
8 690
9 993
10 1378
11 1841
12 2404
13 3077
14 3852
15 4755
16 5796
17 6963
18 8286
19 9775
20 11414
21 13237
22 15254
23 17445
24 19848
25 22473
26 25296
27 28359
28 31672
29 35207
30 39010
31 43091
32 47418
33 52041
34 56970
35 62169
36 67692
37 73549
38 79700
39 86203
40 93068
41 100251

List of values

[1, 8, 31, 80, 159, 282, 459, 690, 993, 1378, 1841, 2404, 3077, 3852, 4755, 5796, 6963, 8286, 9775, 11414, 13237, 15254, 17445, 19848, 22473, 25296, 28359, 31672, 35207, 39010, 43091, 47418, 52041, 56970, 62169, 67692, 73549, 79700, 86203, 93068, 100251]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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